Tupperware is great! I don't have it, but my mom has a lot.
I just told her, I can find something else to Tupperware that is as good. Then I went to some store with all sort of super professional stuff (and expensive) to proof my point 🤣🤣🤣
This pushy sales, I think is something that is quite American (North American.... well, USA). It's not for me as well. And true, its a selling technique for products and services that may be of good quality. However, like you, I usally don't go for anything when a something is sold to me in such way.